Yamaha YZ125 - 2014 Specifications and Reviews

The 2014 Yamaha YZ125 is a lightweight, entry-level motocross bike ideal for younger riders and beginners transitioning to competitive racing. Known for its responsive two-stroke engine and nimble handling, this machine delivers excellent acceleration and maneuverability on closed circuits. The liquid-cooled powerplant and aluminum frame make it a dependable choice for amateur motocross competition.

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General information

CategoryCross / motocross
Year2014
ModelYamaha YZ125

Engine and Transmission Specifications

Transmission type,final driveChain
Gearbox6-speed
Cooling systemLiquid
IgnitionDigital CDI
Fuel systemCarburettor. Mikuni TMX 38
Bore x stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Compression8.6:1
Engine detailsReed-valve-inducted
Engine typeSingle cylinder, two-stroke
Capacity:124.00 ccm (7.57 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakes diameter245 mm (9.6 inches)
Rear brakesSingle disc
Front brakes diameter250 mm (9.8 inches)
Front brakesSingle disc. Hydraulic disc. Hydraulic disc.
Rear tyre dimensions100/90-19
Rear suspension travel315 mm (12.4 inches)
Rear suspensionFully adjustable single shock
Front suspension travel300 mm (11.8 inches)
Front suspensionSpeed-sensitive system inverted fork
Rake (fork angle)28.0°
Frame typeAluminum
 
 

Physical measures and capacities

Fuel capacity7.95 litres (2.10 gallons)
Wheelbase1,443 mm (56.8 inches)
Ground clearance386 mm (15.2 inches)
Overall width828 mm (32.6 inches)
Overall length2,136 mm (84.1 inches)
Overall height1,316 mm (51.8 inches)
Seat height998 mm (39.3 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc93.9 kg (207.0 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
CommentsPremium drive chain has gold-colored plates for outstanding looks.
Color optionsTeam Yamaha Blue/White
Factory warranty30 Day (Limited Factory Warranty)
StarterElectric

Performance Profile & Rider Fit

Best For

Track85%
City5%
Cornering90%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a full-on competition motocross bike best suited to intermediate through expert off-road riders who understand 2-stroke power delivery and clutch management.
PurposeBuilt purely for motocross racing and aggressive trail riding, not for commuting, road use, or casual leisure riding.
Rider FitThe tall 38.6-inch seat height, light 212 lb wet weight, and peaky 2-stroke power demand an active, fit rider comfortable standing and shifting body weight constantly.
CharacterA raw, high-revving 2-stroke racer that rewards precise clutch and throttle control with explosive acceleration and razor-sharp handling on dirt.
Not Ideal ForNot for beginners, road riders, passengers, or anyone wanting comfort, storage, or long-distance capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2014 Yamaha YZ125 Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 998mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2014 Yamaha YZ125, with a moderate knee angle of around 90 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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